250+ iOS apps curated and reviewed
Every iPhone needs a few good topology lens apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 | |
| 2 |  | Free | 5.0★ (1) | Yes | No | May 2026 | |
| 3 |  | Free | 4.0★ (47K) | No | No | Sep 2026 | |
| 4 |  | Free | 5.0★ (5) | No | No | May 2026 | |
| 5 |  | Free | 5.0★ (8) | No | No | Jul 2026 | |
| 6 |  | Free | 4.8★ (25) | No | No | May 2026 | |
| 7 |  | Free | 3.9★ (20) | Yes | No | May 2026 | |
| 8 |  | Free | 4.6★ (5.3K) | Yes | No | Aug 2026 |
This app serves as a community-driven database for topological counterexamples, theorems, and properties. It allows users to explore detailed descriptions, search for spaces satisfying specific logical formulas, and find references for mathematical concepts.
Explore the world with high-resolution satellite imagery and 3D terrain. Dive into streets with Street View and create collaborative, data-driven maps from anywhere.
